Abstract: An optical film, a polarizing plate, and an image display device, each having an optically anisotropic layer obtained by curing a polymerizable liquid crystal composition including immobilizing an alignment state of a rod-shaped liquid crystal compound (LCC) having reverse wavelength dispersibility and a monofunctional compound, in which the rod-shaped LCC has polymerizable groups P1 and P2, and three or more rings B1 selected from the group consisting of an aromatic ring and an alicyclic ring a1 atoms of the rod-shaped LCC and a2 atoms of the monofunctional compound having polymerizable group P3, satisfy a relationship of Expression (1): 0.2<a2/a1<0.55; b1 of the rings B1 contained in the rod-shaped LCC and a total b2 of the rings B2 and the aromatic rings Ar contained in the monofunctional compound satisfy a relationship of Expression (2): b2=b1×0.5 or b2=(b1+1)×0.5.

Abstract: Provided is a polymerizable liquid crystal composition with which an image display device having an excellent contrast can be manufactured; and a cured product, an optical film, a polarizing plate, and an image display device. The polymerizable liquid crystal composition contains a compound represented by Formula (I). L1-SP1-D5-(A1)a1-D3-(G1)g1-D1-[Ar-D2]q1-(G2)g2-D4-(A2)a2-D6-SP2-L2 . . . (I), and a compound represented by Formula (II), L5-SP5-D9-(A5)a3-D10-(G3)g3-D11-M . . . (II).

Abstract: Provided are an imaging device that is inconspicuous from the outside, can easily apply design, and can obtain a clear image, and a laminate. The imaging device includes: an imaging unit that includes an image pickup element; and a transflective film that is disposed on a side of the imaging unit where light is incident into the image pickup element and reflects a part of the incident light, in which the transflective film includes at least one of a cholesteric liquid crystal layer or a multi-layer polymer film, when seen from a direction perpendicular to a surface of the image pickup element where light is incident, a peripheral region surrounding the imaging unit satisfies L*?50 in a CIE-Lab (D50) color space, and when seen from the direction perpendicular to the surface of the image pickup element where light is incident, the transflective film is disposed to cover at least the imaging unit and the peripheral region.

Abstract: An object of the present invention is to provide a method for producing a reflective layer having an excellent diffuse reflectivity and a wide reflection wavelength range. Another object of the present invention is to provide a reflective layer having an excellent diffuse reflectivity and a wide reflection wavelength range.

Abstract: A gun drill machine capable of shortening a margin dimension required in a gun drill as much as possible. In a free zone between a chip box and a moving spindle unit, a plurality of swing stopping devices for loosely holding a gun drill and suppressing the swing of the gun drill are arranged, and each swing stopping device is configured to freely retract from a steady action position where a swing stopping action is performed to avoid interference with the spindle unit that moves in the free zone.

Abstract: Provided is a compound having a wide temperature range exhibiting liquid crystallinity and excellent precipitation suppression and solubility; and a polymerizable composition, a cured product, an optical film, a polarizing plate, and an image display device, each using the compound. The compound is represented, for example, by Formula (1) or (2).

Abstract: Provided is a compound which is capable of reducing a tilt angle of a liquid crystal molecule, and a polymerizable composition, a cured product, an optical film, a polarizing plate, and an image display device, each using the compound. The compound is represented, for example, by Formula (I), P-Sp-Z-G1-(X1-Cy1)n-(X2-A1)m-X3-A2.

Abstract: A compound having an uretonimine group contains, as a structural unit, a carbodiimide compound derived from at least one of an aliphatic diisocyanate and an aromatic diisocyanate, and also contains an isocyanate compound as a structural unit, wherein the residue obtained by removing an isocyanate group from the isocyanate compound and the residue obtained by removing a carbodiimide group from the carbodiimide compound are different.

Abstract: The present invention provides a viewing system capable of providing varying visual effects with a simpler configuration. In addition, the present invention also provides a display device, a stage installation, and a polymerizable liquid crystal composition.

Abstract: To provide a decorative film capable of applying a visual effect of making a pattern not visually recognizable, in a case where it is seen from the front, and making it visually recognizable, in a case where it is obliquely seen. a circular polarization plate including a linear polarization plate, and a laminate of a uniaxial retardation layer or a biaxial retardation layer; and a circularly polarized light reflection layer which reflects circularly polarized light having a revolution direction opposite to that of light transmitted through the circular polarization plate in a vertical direction from the linear polarization plate side are included.

Abstract: Provided is an image forming method including a step of imagewisely applying, onto a base material by an inkjet method, at least two inks containing a polymerizable liquid crystal compound, a chiral compound, and a polymerization initiator and having reflection wavelengths different from each other, such that the total application amount of the inks provides an image area ratio of 50% or more in an image forming region.

Abstract: A polymerizable composition includes a polymerizable liquid crystal compound of Formula (I) and a urethane (meth)acrylate monomer including a urethane bond and three or more (meth)acryloyl groups: Q1-Sp1A-Lm-1A-Sp2-Q2??(I) In Formula (I), A represents a cyclic divalent group (at least one is a divalent saturated hydrocarbon ring group), L preferably represents —C(?O)O— or —OC(?O)—, m represents 3 to 12, Sp1 and Sp2 preferably are alkylene, and any one of Q1 and Q2 represents a polymerizable group. A film including a layer obtained by curing the polymerizable composition; and a film adjacently including a layer obtained by curing the polymerizable composition including a polymerizable liquid crystal compound represented by Formula (I) and a layer obtained by curing a composition including a urethane (meth)acrylate monomer and a manufacturing method thereof, are also disclosed.

Abstract: The present invention provides a method for producing a cholesteric liquid crystal film capable of producing a cholesteric liquid crystal film which is formed into a predetermined shape without cracks and exhibits a high modulus of elasticity. The method for producing a cholesteric liquid crystal film according to the present invention includes step 1 of forming a coating film which includes a liquid crystal compound A having a first reactive group and a second reactive group that is different from the first reactive group or which includes a liquid crystal compound B having the first reactive group and a liquid crystal compound C having the second reactive group, step 2 of forming a cholesteric liquid crystalline phase in the coating film, step 3 of allowing the first reactive group to react to cure the coating film, step 4 of forming the coating film obtained in the step 3, and step 5 of allowing the second reactive group to react to produce a cholesteric liquid crystal film.

Abstract: A polymerizable liquid crystal compound represented by Formula (I): Q1—Sp1—[A—L]—A—Sp2—Q2??(I) A represents a divalent nitrogen-containing saturated cyclic group (that may have a substituent) formed by removing two hydrogen atoms from piperidine or piperazine, a phenylene group that may have a substituent, or a trans-1,4-cyclohexylene group that may have a substituent; L represents a linking group such as —C(?O)O— or —OC(?O)—; m represents 3 to 12; Sp1 and Sp2 represent an alkylene group having 1 to 20 carbon atoms; any one of Q1 and Q2 represents a polymerizable group; and Formula (I) has a nitrogen-containing saturated cyclic group and a phenylene group that are directly bonded to each other via —C(?O)O—. By using a polymerizable composition including the polymerizable liquid crystal compound, a film such as a retardation film can have low birefringence or a reflection film can have high selectivity in a reflection wavelength range.

Abstract: Provided is an imaging device that is inconspicuous from the outside, can easily apply design, and can obtain a clear image. The imaging device includes: an imaging unit that includes an image pickup element; a transflective film that includes a cholesteric liquid crystal layer and reflects a part of incident light; and a decorating member that is disposed on a side of the imaging unit where light is incident into the image pickup element, in which in a case where the decorating member is seen from a direction perpendicular to a surface of the image pickup element where light is incident, a through hole is formed at a position of the imaging unit, and the transflective film is disposed inside at least the through hole of the decorating member in case of being seen from the direction perpendicular to the surface of the image pickup element where light is incident.

Abstract: A transfer sheet includes a cured liquid crystal composition layer, a block layer including a (meth)acrylic polymer, and a thermoplastic welded layer in this order, the thermoplastic welded layer and the block layer are in direct contact with each other, and the thermoplastic welded layer includes a thermoplastic resin and an ultraviolet curable resin.

Abstract: A transmission decorative film includes a circular polarization plate and a circular polarization reflection layer disposed on the circular polarization plate. The circular polarization reflection layer includes at least one or more first cholesteric liquid crystalline layers that reflect any one of left circularly polarized light or right circularly polarized light. The first cholesteric liquid crystalline layer includes two or more reflection regions having different selective reflection wavelengths. The circular polarization plate transmits circularly polarized light having a revolution direction opposite to a revolution direction of the circularly polarized light reflected by the first cholesteric liquid crystalline layer.

Abstract: Provided is a half mirror which is used for a windshield constituting a head up display, and in which a feeling of glare is suppressed, and a boundary between a region which selectively reflects visible light and a region which reflects visible light is made inconspicuous. The half mirror has a reflection layer including a non-reflection region which does not reflect visible light, a reflection region which selectively reflects visible light, and a mixed region which is provided between the regions and in which a non-reflection portion which does not reflect visible light and a reflection portion which selectively reflects visible light are mixed, and in the mixed region, an area of the reflection portion is gradually increased from the non-reflection region toward the reflection region.

Abstract: An object of the present invention is to provide a method for producing a reflective layer having an excellent diffuse reflectivity and a wide reflection wavelength range. Another object of the present invention is to provide a reflective layer having an excellent diffuse reflectivity and a wide reflection wavelength range.

Abstract: An infrared detecting semiconductor device comprises: an optical absorbing layer of type-II disposed between first conductivity-type and second conductivity-type semiconductor layers; and an optical filtering film of n-type InGaAs having an n-type dopant concentration larger than 8×1017 cm?3. The optical filtering film includes first to third semiconductor regions, which are sequentially arranged in a direction of a first axis on the optical filtering film. The first semiconductor region has an n-type dopant concentration of 2.0×1019 cm?3 or more. The third semiconductor region has a n-type concentration of 3.0×1018 cm?3 or less. The second semiconductor region has an n-type dopant profile monotonically changing from a first dopant concentration at a boundary between the first and second semiconductor regions to a second dopant concentration at a boundary between the second and third semiconductor regions. The first dopant concentration is greater than the second dopant concentration.